Cat scratching post



FIG. 1 is a perspective view of a cat scratching post showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is bottom view thereof.

The broken lines in the drawings depict portions of the cat scratching post that form no part of the claimed design. 

CLAIM The ornamental design for a cat scratching post, as shown and described. 